Abstract
Nanoindentation was used to study the effect of dissolved hydrogen on the nano plastic deformation in engineering steel. In this study, the results of high strength steel, SCM435 and carbon steel, S15C were discussed. We focused on the hydrogen effect on both onset and the resistance of plastic deformation at nano scale. Nano hardness was found to be increased with increasing in hydrogen content in SCM435 steel. The displacement burst of indentation curve was observed in both materials. The result of SCM435 steel, however, exhibited large scatter due to the large surface roughness. We, thus, investigated the displacement burst which occurred in the same grain of S15C steel. The result revealed that hydrogen increased the indentation force which induced displacement burst. Contrary to this, this force value decreased with a decrease in hydrogen content.
Published Version
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